PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/11/12-13:28:10
G02     45.9           44.4                2.5 +/-    1.32       3.4 +/-    1.32  0.050 / 0.040
G05     105.1          70.8                3.8 +/-    0.68       4.0 +/-    0.68  0.050 / 0.040
G12     187.7          49.5                5.5 +/-    1.06       7.0 +/-    1.06  0.040 / 0.040
G25     256.9          59.9                3.9 +/-    0.91       4.4 +/-    0.91  0.040 / 0.030
G29     318.5          41.0                2.0 +/-    1.52       2.9 +/-    1.52  0.020 / 0.020